Machines



4, 1953 w. A. ANDERSON I 2,647,690

MULTIZERO INDEXING DEVICE FOR ADDING MACHINES Fi led Dec. 15, 1950 INVENTOR.

WAL rm A. ANDERSON 2 /z A BY Q7 5- -1 44m A 7' TORNEV tom layer of pins I I is provided on its lower side with a stud 29. Mounted on a bracket 30 slidable on a fixed rod 3|, which bracket is a part of the entering mechanism 9 and is pivotally connected to arm I5, is a lever 32. Lever 32 is formed with a cam nose 33 on one end which cam 33 is normally positioned clear of studs 29 on the lower pins II and carries a stud 34 fixed in its other end, see also Figure 3. A spring 35 secured between bracket 36 and lever 32 and a detent 36 on bracket 30 urged counterclockwis by a spring 31 serve to retain lever 32 in its normal position.

When the last significant figure of a constant factor has been entered and the remainder of the denominational orders are to have s indexed therein, a special key 49 adjacent the normal 0 key I4 is depressed. Depression of this key rocks a bell crank 4I pivoted on a bracket 42 fixed to base plate I1 to thrust a link 43 rearwardly and rock arm 44 counterclockwise. Arm 44 is pivoted at 45 to plate I1 and carries a stud 46 engaged with a slide 41 slidabl on a stud 48 in arm I and urged forwardly by a spring 49. The rear end of slide 41 lies in front of an extension of lever 32 and when slide 41 is moved rearwardly by depression of key 40 through link 43 and arm 44, it rotates lever 32 counterclockwise to an active position. Spring 49 restores the slide 41 and the key 40 to normal position upon release of pressure on key 40 but lever 32 remains in its set position since its stud 34 has been moved into the forward notch of detent 36. In its movement to set position cam nose 33 of lever 32 has engaged stud 29 of the pin I I in alignment therewith and has set the pin to active position.

After lever 32 has been set to active position or concomitantly therewith, escapement arm 23 is moved to an ineffective position to permit a free movement of arm I5 by spring 29 to the rightmost position. Such releasing of escapement arm 23 is under control of a constant key 52, Figure 1. This constant key 52 is the same key as key 90 in the Swanson et al. application, Serial No. 182,672, supra, with the exception that the interlock nose I64 and the cooperating end of lever SI of Figure 1 of said application have been omitted as unnecessary.

Briefly the escapement release mechanism comprises the constant key 52 which is pivoted on a stud 50 in a lever 53 rotatable on a stud 5! in the right wall 54 of the keyboard. A spring 55 connected to the forward end of lever 53 serves to maintain the key 52 and lever 53 in a normal position. The upper end of lever 53, Figure 2, is connected to an arm of a bell crank 59 which carries a latch 51 for a slide 58 urged rearwardly by a spring 59. A connecting arm 60 is pivoted on slide 58 and normally rests in front of a square stud BI on escapement arm 23. Depression of key 52 willthrough levers 53 and 56 release latch 51 from slide 58 which will then be moved rearwardly by a spring 59 and through arm 90 move square stud BI rearwardly. Such motion of stud BI rocks escapement arm 23 counterclockwise in Figure 2 to release it from post of arm I5. Arm I5 will then move freely to its rightmost position. Duringthe following machine cycle, slide 58 is restored to normal latched position by a power operated arm 62 as described in the above Swanson et al. application.

It will be recalled that lever 32 on bracket has been previously set to active position by operation of the multi-zero key 40. During the movement of arm [5 and bracket 30 connected thereto when released by depression of constant key 52, cam nose 33 of lever 32 wipes across the studs 29 of all of the 0 pins I I to the right and sets these pins to active position thus indexing 0 in all remaining denominational orders.

The width of cam nose 33 is slightly greater than that of the ends of push rods I3 with the extra width to the right side. Consequently, the rightmost 0 pin I I will be set before the arm I5 has fully moved into the end position. The short remaining movement of arm I5 is used to release lever 33 for return to its inactive position. De-

tent 36 has its forward end bent upwardly to a point above the depressed forward end of lever 32. A stationary release arm 65 is fixed to the right hand side of the pin carrying frame I2 and extends leftward between the lowest row of pins I I andthe path of the forward depressed arm of lever 32. After cam nose 33 has set the last 0" pin II'to the right and during the short remaining movement of bracket 39, the release arm 65 strikes the forward end of detent 36 to cause clockwise rocking of said detent and consequently release of lever 32. Spring 35 connected to lever 32 thereupon restores the lever to its normal ineffective position in readiness for further operation. When swinging arm I5 is restored one or more steps toward the left, detent 36 is freed from the release arm 65 and is again effective to retain lever 32 in a set position.

It will be now evident that the multi-zero indexing mechanism above described when operated, will index a zero in all non-indexed orders of pins and does not index a fixed number of Zeros thus requiring a separate key for each different number of zeros and a plurality of key operations to locate the indexing mechanism at the full capacity position.

The above description of a preferred embodiment of my invention is illustrative only and is not to be taken in a limiting sense as many variations thereof are possible within the scope of the following claims.

What is claimed is:

1. In an adding machine or the like, having a plurality of lines of normally non-indexed settable stop pins to control amount entering operations of said machine, a plurality of manually operable stop pin setting members relatively shiftable across said stop pins, spring means to relatively shift said stop pins and said setting members to present successive lines of said stop pins to said settin members and an escapement device to restrain such relative shifting means, the combination of a member relatively shiftable with said stop pin setting members, key operable means to set said member from an ineffective position to a position wherein it will engage portions of certain of said stop pins and thereby set said certain pins during said relative movement, and means to release said escapement device to free said stop pin setting members and said member shiftable therewith for relative movement with respect to said stop pins.

2. In an adding machine or the like, having a plurality of lines of indexable stop pins to control value entering operations of said machine, a plurality of manipulative stop pin indexing members and means to relatively shift said stop pins and said setting members to bring said indexing members into operative relationship with successive lines of stop pins, a member relatively shiftable with said indexing members and normally in a non-engaging position with respect to said stop pins, manual means to set said member to an indexing position wherein said member will index one of said stop pins in each line traversed during such relative shift, detent means to hold said member in said set position, means operable to control said shifting means to cause an uninterrupted relative shift of said indexing members and said stop pins to the full extent of said relative movement and means operative at the end of said relative shifting movement to release said detent from said member and enable restoration of said member to the non-engaging position.

3. In an adding machine or the like, having a group of settable index pins arranged in rows, a plurality of manipulative members operable to set said index pins to a position to control amount entering operations of said machine and relatively shifta-ble into alignment with successive rows of said group of index pins, a member movable with said plurality of manipulative members and operable to set the adjacent index pin representing a zero, means to retain said member in an operated position, manual means to operate said member to an index pin setting position, a constant key, means operable thereby to determine relative shifting of said plurality of members to an end position with respect to said group of index pins, said member, when in the operated position, acting during said relative shifting movement to set the index pin representing zero in each row traversed during such relative shift, and mechanism operative at said end position to release said holding means from said member to enable restoration of said member to a non-indexin position.

4. In an adding machine or the like, having a plurality of settable index pins arranged in denominational orders, pin setting members relatively denominationally shiftable across said index pins, power means to shift said pin setting members relative to said index pins and escapement mechanism to restrain said members against the action of said power means and in alignment with any denominational order of said index pins, a cam member shiftable across said plurality of index pins with said pin setting members, means operable to set said cam member from a normal ineffective position into an effective pin setting position with respect to one index pin in each denominational order, whereby said one index pin in the aligned denominational order is set, detent means to retain said cam member in the set position, a normally latched spring urged means operable when unlatched to release said relatively shiftable pin setting members and said cam members from restraint by said escapement mechanism whereupon said power means is effective to shift said pin setting and cam members to an end position, a latch for said spring urged means, a manually operable key to release said latch from said spring urged means, said cam member when in the effective position acting during the resultant relative shift of said index pins and said pin setting members to set said one index pin in each denominational ment and release said detent from said cam member to enable restoration of said cam member to the normal position.

5. In an adding machine or the like, having a plurality of settable index pins arranged in denominational orders, said pins representing values from 0 to 8 in each order, manipulative pin setting means shiftable into alignment with successive denominational orders of said index urging said manipulative pin setting means 1n one direction, and escapement mechanism to restrain said manipulative pin setting means against movement and operable by said manipulative means to permit advance of said manipulative means to the succeeding denominational order, normally latched spring driven means to disable said escapement mechanism and free said manipulative pin setting means for movement by said power means to an end position, a latch for said spring driven means, a constant key operable to release said latch from said spring driven means, a cam member movable by said power means in synchronism with said manipulative means, a key to set said cam member into a pin setting position with respect to the index pins representing 0, a detent to hold said cam member in such pin setting position and an arm operative to release said detent from said cam member when said manipulative means is in said end position.

WALTER A. ANDERSON.

References Cited in the file of this patent UNITED STATES PATENTS OTHER REFERENCES Ser. No. 279,077, S'obisch (A. P. C.), published May 25, 1943. 

